* {
    margin: 0;
    padding: 0;
}

#bg {
    position: absolute;
    height: 100%;
    width: 100%;

    background-repeat: no-repeat;
    background-position: center;
    background-image: url("../img/3江北校门.jpg");
}

#box {
    padding: 50px;
    background-color: rgba(240, 248, 255, 0.961);
    border-radius: 20px;
    margin-top: 10vw;
    margin-left: 37vw;
    width: 20vw;
    height: 22vw;
}

h2 {
    margin-top: 10px;
    font-size: 40px;
    color: rgb(0, 131, 212);
    text-align: center;
    font-family: '宋体', 'SimSun', sans-serif;
}

#uname {
    margin-left: 30px;
}

.in {
    margin-top: 30px;
    font-size: 20px;
    margin-left: 50px;
    color: rgb(1, 71, 142);
    font-family: '黑体', 'SimSun', sans-serif;
}

#con_in {
    margin-left: 12px;
}

.input {
    height: 30px;
    border-top: 0px;
    border-left: 0px;
    border-right: 0px;
    background-color: rgba(255, 255, 255, 0);
    border-color: rgb(0, 99, 142);
    font-size: 15px;
}

.input:focus {
    outline: 0px;
}

.sub {
    height: 40px;
    width: 130px;
    border-radius: 100px;
    border: 0;
    background-color: rgba(0, 157, 255, 0.594);
    color: rgb(0, 67, 109);
    font-size: 15px;
}

.sub:hover {
    background-color: rgb(0, 157, 255);
    color: aliceblue;
}

#log_but {
    margin-top: 40px;
    text-align: center;
}

#link {
    margin-top: 30px;
    text-align: center;
    font-size: 14px;
}

a {
    text-decoration: none;
    color: rgba(0, 86, 129, 0.594);
}

a:hover {
    color: rgb(110, 5, 5);
}